Magnetic resonance imaging apparatus and magnetic resonance imaging method

摘要

A apparatus includes an acquisition unit to acquire magnetic resonance data in every data group, a unit to control the acquisition unit to collect the data for one or a plurality of data groups during a collection period which is set based on a starting time phase of a cardiac cycle of the subject, a unit to determine the data among the data acquired by the acquisition unit as ineffective data if at least a part of it is related to a data group acquired during an ineffective period, and as effective data if all of it is related to a data group acquired during a period other than the ineffective period, the ineffective period being set based on an ending time point of the cardiac cycle in which the data is acquired, and a unit to reconstruct an image regarding the subject by using the effective data.

主权项

1. A magnetic resonance imaging (MRI) apparatus comprising:
static and gradient magnetic field generators, at least one radio frequency (RF) coil coupled to an imaging volume, RF transmitter circuits, RF receiver circuits and a computer stem connected to control said gradient field generator and RF circuits, said computer system being configured to
acquire MRI data from a subject in plural data groups of k-space;collect MRI data for one or a plurality of data groups during a predetermined collection window period which begins at a time point in a cardiac cycle of the subject and continues for a consistent and constant delay time regardless of the length of the cardiac cycle;determine acquired MRI data as ineffective data if at least a part of a respectively corresponding data group was acquired during an ineffective period, and as effective data if all of it is acquired during a period other than the ineffective period, the ineffective period being a period prior to an ending time point of the cardiac cycle during which at least part of an atrium diastole occurs to the ending time point of the cardiac cycle; record information related to data groups of the ineffective period; reacquire effective MRI data related to the data groups specified by the recorded information; and reconstruct an image for the subject by using the effective MRI data.